Texas (locomotive)
As Texas to Tender - steam locomotives with the wheel arrangement 1'E2 'or 2-10-4 called, so with a leading carrying axle , five coupled axles and a trailing bogie . The running axle and bogie are movably mounted in the frame of the locomotive.
These locomotives were mainly used in North America . The following bogie enables the creation of a large-sized fire box , which ensures a high evaporation capacity of the boiler .
Names
On the Texas and Pacific Railroad , the class I-1 locomotives were used.
On the Chicago, Burlington and Quincy Railroad in the USA , locomotives of this type were referred to as "Colorado" and in Canada as "Selkirk".
Technology and commitment
The 1944-built, oil-fired class 5011 of ATSF was intended for heavy fast freight trains in freight transport over long distances. Its drive wheels have a diameter of 1880 millimeters, so that their speed was moderate at the 120 km / h, which was easy on the drive. The average axle load of the five coupling axles is around 34.5 tonnes, so that a very powerful locomotive was available, the maximum continuous output on the towing hook was 5660 PSe , which corresponds to almost 7000 PS engine output for diesel locomotives .
When driving in the low speed range under full load, each of the two cylinders of the vehicles exerted a maximum compressive force of almost 100 tons on the drive pin of the drive axle , a value that no locomotive in the world can match.
This results from the parameters 1880 millimeter drive wheel diameter, 172.4 tons of friction load and 864 millimeter cylinder stroke. The cylinder diameter is 762 millimeters, the boiler pressure 21.8 bar. Despite these enormous, structurally difficult to control forces, the design also proved itself very well in the mountains. A main route of the ATSF over the Raton Pass had a 3.3% gradient. This robustness, which is by no means a matter of course, is underlined by the fact that the Pennsylvania Railroad borrowed ten of these locomotives for heavy coal transport in 1956. Instead of the 160 cars of their own specially built Texas design, the Class 5011, which was actually intended for express freight train service, could still be expected to have almost 130 freight cars, i.e. around 9500 tons.
The coal-fired locomotives of this wheel arrangement, which were used on the Chesapeake and Ohio Railroad ( Class T-1 ) and the Pennsylvania Railroad ( Class J1 ), had drive wheels with a diameter of 1753 millimeters and an additional booster . They carried coal trains of about 12,000 tons on a flat terrain alone.
literature
- Arnold Haas: Steam Locomotives in North America. USA and Canada. Franckh, Stuttgart 1978, ISBN 3-440-04493-9
Web links
- The Texas Type Locomotive (English)